Rom files

Ok here is the deal I am sure people have been asking this over and over again and I am sorry but if someone could help me that would be great. I just got my psp (used) and I want to know how to play my rom files on it ( I already have the snes9x and all the roms I need) but I am really bad with computers and all the instructions on other sites confuse me. To makes things worse I have a mac and all the sites I could find are for pc and I am on my collages's internet server that blocks a lot of sites. Can someone please give me a dumbed down step by step way to get my roms to play on my psp?? I was told this was a good site to go for help

for 1 thing wat firmware is your psp?

How do I find that out like I I said I got it used

http://pspbrew.com/forum/viewtopic.php?t=12175

If you have a slim look at that topic.

No it is not a slim it is one of the older ones

for 1 thing wat firmware is your psp?

I have no idea what that means where do I find out which one I have???

Look at 'System Settings' in the 'Settings' tab inthe XMB(main menu)

It says my software is version 3.90

[ace]

Ok, you will need to make a pandora's battery to install a custom firmware on your psp. Custom firmware = Roms. Sony firmware = bad. Just check our tutorials section for one of the many wonderful knowledge filled tutorials. Before you ask, just read like the first pandora's battery tutorial you find. More than likely it will apply to you If you have questions whether you should follow a certain one you have found, then go ahead and ask.